These authors contributed equally to this work. ⇤ Corresponding authors.The sudden outbreak of novel coronavirus 2019 (COVID-19) increased the diagnostic burden of radiologists. In the time of an epidemic crisis, we hoped artificial intelligence (AI) to help reduce physician workload in regions with the outbreak, and improve the diagnosis accuracy for physicians before they could acquire enough experience with the new disease. Here, we present our experience in building and deploying an AI system that automatically analyzes CT images to detect COVID-19 pneumonia features. Different from conventional medical AI, we were dealing with an epidemic crisis. Working in an interdisciplinary team of over 30 people with medical and / or AI background, geographically distributed in Beijing and Wuhan, we were able to overcome a series of challenges in this particular situation and deploy the system in four weeks. Using 1,136 training cases (723 positives for COVID-19) from five hospitals, we were able to achieve a sensitivity of 0.974 and specificity of 0.922 on the test dataset, which included a variety of pulmonary diseases. Besides, the system automatically highlighted all lesion regions for faster examination. As of today, we have deployed the system 2 All rights reserved. No reuse allowed without permission.

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The trade war between the USA and China has shocked many across the world. A disruption to the interdependence of the two largest economies seemed unfathomable. However, in an effort to thwart China's economic practices and boost the US economy, President Trump's administration levied tariffs on Chinese imports shortly after taking office, moving US foreign economic policy from liberalism, practiced for decades, to protectionism. China has retaliated, and the trade war continues today. With conceptual insights from the nationalism literature, we explore the nationalist roots of the trade war from both the US and Chinese perspectives. In the USA, the Trump administration's plan to achieve energy autonomy, decrease reliance on foreign resources, and reinvigorate the manufacturing sector has led to protectionist policies, the othering of China, and hence the trade war. Although reluctant to enter the conflict, China has rebuffed the USA, resisting and counterattacking US actions, owing to a long-felt sense of persecution in the global space and an eagerness to participate fully, and lead in some issue areas, in international affairs. The conflict continues into the COVID-19 era, marked by US scapegoating of China and hits to economic performance. Until both sides are convinced they have achieved their goals, or the USA undergoes an administration change, the conflict will likely continue.